I´ve been reading the article “The Role of Verbal Behavior, Stimulus Nameability, And Familiarity on the Equivalences of Autistic and Normally Developing Children” published by Jennifer O´Connor, Aoife Rafferty, Dermot Barnes-Holmes and Yvonne Barnes-Holmes in The Psychological Record, 2009 no 59 with great interest as stimulus equivalence, relational frame theory is one of my primary professional interests, and I specially interested in research in this area involving persons with ASD.
This study has investigated the influence of verbal capabilities of participants on the emergence of equivalence. And this study supports previous results by other researchers, that equivalence performance is related to levels of verbal behavior. Interesting is the classification used in this study. They apply the classification from the CABAS framework. Divided into; Listener/Prespeaker, Speaker/Prereader, Speaker/Reader, and Reader/Writer (Greer and Ross, 2007). I have never seen this classification used in this kind of research, and find it useful that they use an already much used classification based on the analysis of verbal behavior. It would be a great step forward for research in this area if several studies could use the same classification. But I do raise some questions regarding the description of ASD who is divided into Mild and Moderate without further information, but as this is not included in the discussion of results, it probably does not matter.
The study discuss the results in terms of the theory of naming facilitating equivalence and the position of RFT, stating that MTS and exemplar training facilitate the emergence of equivalence. The data gathered in this study can not support one over the other, but as the article states “the findings are consistent with existing empirical evidence that demonstrates the utility of exemplar training int the facilitation or establishment of derived relations as equivalence.”
The data indicate that the familiarity of stimuli correlated with rapid training and test performance, and that children who failed the equivalence test with unfamiliar stimuli passed the test with familiar stimuli. So, this study support the notion that familiar stimuli facilitate the production of equivalence. The data indicate this both with the normally developing children and the children with ASD.
This study included an antecedent, actually “goes with…”. And the data shows that this antecedent influenced the responding. This could as far as I see it, give the study a bias toward also testing the children’s listener-reportoar, and this may influence the data showing trails needed to achieve equivalence. It would be useful if some research could be done to investigate the impact such an antecedent has on performance.
I really appreciate the good and accurate description of the phases in the experiment. It´s really great to se that one describe the procedures in such a manner that one easier can evaluate the results, and doing it possible for others to replicate the experiment!
Happy reading!
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